Office



(No Model.)

A. M. SOUTHARD 8: G. W. SMITH.

- SCREW READING MAGHINE.

No. 450,262. Patented Apr. 14; 1891.

w/ N588 M; Z wron W By I ATTORNEY.

f-f-UNITED STATES PATENT 0Fr1cm ABRAHAM M. SOUTHARD AND GEORGE w. sMrrH,OF DENVER, oOLoRAno; SAID SMITH ASSIGNOR TO SAID s'otrr mnn ND Jot-IN n.BLOOD, or

$AME PLACE.

' SCREW-'BEADLINGNIACHINE.

SPECIFICATION formingpart of Letters Patent No. 450,262, dated April 14,1891.

v Application filed September 16, 1:890. Serial No. 365,10- (N0 model.)

-To. all whom it may concern: 1

Be it known that we, ABRAHAM M. SOUTH- 'ARD and GEORGE W. SMITH, bothcitizens of the United States of America, residing at Denver, in-thecounty of Arapahoe and State of Colorado, have invented certain newanduse- .ful Improvements in Screw-Beading Machines; and we do declare thefollowing to exact description of the invention, such as will enableothers skilled in the art to which it appertains to make and.

be a full, clear, and

:use the same, reference being had to the accompanying of thisspecification.

dinary header or beading-machine used by tinsmiths is transformed into amachine capable of forming screw-threads on the joinall kinds of lightmetal,

ing extremities of pipes or tubing, such as stove-pipes, heatingpipesleading from furnaces, speaking-tubes,

and .all kinds of sheet-metal conduits for hot or cold air, smoke,sound, &c.. The inconvenience, trouble, and vexatious delay nearlyalways experienced in joining the extremities of pipes of this class inthe ordinary way are too well known to need further comment. Hence theobject of our improvement is to form a machine of the class stated whichshall be simple in construction, economical in cost, easily operated,and durable.

To these ends our invention consists of the features hereinafterdescribed and claimed.

In the accom panying drawings is illustrated an embodiment of theinvention, in which drawings- Figure 1 is an elevation of an Ordinarybeading-machine provided with our improved attachments, the standard orsupport for the machine being shown partially broken away. Fig. 2 is avertical section taken through the line 00 as, Fig. 1, looking towardthe right. Fig. 3 is a longitudinal section, partially broken away,taken through one of the rollers provided with a removable threadedsleeve. Fig. 4 is an elevation in detail of the gage of the machine,showing the half-nut or threaded lug, which, when the parts areassembled, on-

drawings, and to the figures of. reference marked'thereon, which form apart gages the "threaded shaft. Fig. 5 shows an elevation of thethreaded extremity of a section of pipe. This View is designed toillus-' trate the work which the machine will accomplish.

In the views, wherein similar reference characters indicatecorresponding partsof the mechanism, let the numeral 1 designate theframe-work of the ordinary beading-machine supported uponastandard2,restingona base.

(Not shown.) Within the frame is suitably journaled and supported theshafts 3 and 4:, provided with a cog-wheel 5, secured to each shaft.These cog wheels mesh withfleac-h 5 other, so that when one shaft isrotated mo- Our invention relates to an improved form and constructionof devices-whereby the or tion is also communicated to the other.

The numeral 6 designates asuitable crank secured to shaft 3, a crankbeing the means .usually employed for applying power tothis class ofmachines.

Secured to the outer extremities of the shafts are the bead-rolls 7 andS. Roll17 is provided with a circumferential groove and roll 8 with acorresponding-tongue,.the tongue and the groove coactingin .formingthehead upon a section of. sheet-metal pipe or tubing so placed withreference to the rolls that one roll engages the interior and the otherthe exterior of the pipe or tube.

9 is an adjustable gage, which engages the end of the section of pipe ortube acted upon, by means of which gage the distance of the bead fromthe end of the tube acted upon is regulated, the gage being heldstationary during the operation of heading. Such is the ordinarybeading-machine.

Our improvement consists in forming a screw-thread 10 upon one shaft,providing the gage with a correspondingly-threaded halfnut, andpermitting the gage to move freely upon the guides.

As shown in the drawings, shaft 3 is provided with the screw-thread 10.This thread may be formed upon the solid shaft. Itis deemed preferable,however, to provide the 5 shaft with a removable threaded sleeve 11, asshown in Fig. 3, the shaft being provided with a lug 12, adapted toenter a corresponding recess in the sleeve at one extremity, while atthe opposite extremity the sleeve is I00 will i it providedwith a lug13, entering a corresponding lecessformed in roll 7. Thus the sleeve isheld securely in place upon the shaft, but may be quickly and easilyremoved and a difierently-threaded sleeve substituted therefor, orwhenfor anyother reason the removal" of the-sleeve is considered necessaryor desir-able. The gage is provided on the side adjacent to shaft 3 witha half-nut 14, secured in place by a countersunk screw 15. This nut isthreaded to correspond with the threads 11 upon the shaft, the nutengaging the threaded portion of the shaft during the operation ot' themachine. 5

stationary during the operation of the machinefinkfo'rming albeadfthe'rebeingzno feed 'toithe fgage,sas beforestated.

2o In theiuse"of -our improved machine Ithe set-'sere'w loriseitherremoved o'riloosened,i-so

that it will not engage the guide or guides, "which: noustislideifreel-y through =theframe.

"be readily understood. :By

ztp'rovitledythe rolls are iso radj nsted "that one extremityof?aw's'ecti'on or pipe maybe placed 3 5 o'f ithe 'pipe.

0 the threaded port-ion.

fihe advantages 'of having the joiningeex tremi'ti'es'of"stovelpipe'sandsimil-arrpipesi'or tubes threade'd instead of em ployin-g the old Thescrew 16 of the ordinary beading-ma-i chine enters the guide 17 andholdsthegage' The operation ofiiour improved: machine-Will- I I k turning atop wscrew 218, With whichithe beadingm-achineis.

method of sliding the end of-oneseetion into theend o'fthe other sectionin forming the joints are obviously numerous. Among these advantages maybe mentioned the ease of forming the screw-joints and their greatersecurity, therebeing-atthe same time a'considerable saving of materialsince no supporting-wires areneeded with'the screw-joint pipe, and thereis no necessity for overlapping the ends of the sections so far informing the screw-joint asthe ordinary joint, thus making a considerablesaving in this item alone.

Having thus described our invention, what we elaimis l. Thecombination,-in a machine for forming screw threads upon the extremitiesof "sheet-metal pipes or tubes, of a frame, a pair of shaftsjournaiedltherein,apair' (if coaeting bead-rolls .mountetl upon the ishaftgione of Lsaidrshafts beinggprovided iwit'h threa'ded porti'on,:-aigage"slidingly supported .be'ti'ween ithe'fishaft's :and ip'rovidedwith :a feeding attachmen trcon'sistin g of halfsnutorathreaiied-1u-gadapted to engage one'side of the: threaded shaft; substantiallyasand-fon 'theipurposeset 1 forth.

.2. .'l he combination,zwith'axframe,syo'fiajipai1-. 2 of shaftsjou'rnaled therein; apai'riofibeading- -.shafts-beingzprovitledwithiaremovableserewtthrea'de'd ::sleeve,:=a gage .islitli'nglysupported between the shafts and providetlwwithza'feeding :attach meritconsi s'ting 6f halt'mut or =threadedilugexiapteiflFQtoengageitheith'reatled "sleeve: on theshafh andr suitableimeans ofrotatin'gcthe shafts, substantially; as described.

iIn' testimony wh e'reofiweafiixiour signatures *hnpresence ortwo-Witnesses.

(ABRAHAM .zSrOUiDHARD. GEORGE W. S'MI'FH. 3V1 tnesses:

aIs'rrAM R. :Hovvzn, M. 'MeOoNNELL.

